How do you pick names for your Sims?

Depends on the individual game/sim. Sometimes random, sometimes based on something. I try to pick names that I feel is "in character" for the parents to pick. One that's not on the list is sometimes I'll, like, portmanteau the two parents names to make a new baby name lol. So, like, when I my sim Alinah got with Caterina Lynx, I named their twins Calin and Catlin.